import buildURL from "../helpers/buildURL";
import buildFullPath from "../core/buildFullPath";
import settle from "../core/settle";
import { isUndefined } from "../utils";

/**
 * 返回可选值存在的配置
 * @param {Array} keys - 可选值数组
 * @param {Object} config2 - 配置
 * @return {{}} - 存在的配置项
 */
const mergeKeys = (keys, config2) => {
  let config = {};
  keys.forEach((prop) => {
    if (!isUndefined(config2[prop])) {
      config[prop] = config2[prop];
    }
  });
  return config;
};
export default (config) => {
  return new Promise((resolve, reject) => {
    let fullPath = buildURL(
      buildFullPath(config.baseURL, config.url),
      config.params
    );
    const _config = {
      url: fullPath,
      header: config.header,
      complete: (response) => {
        config.fullPath = fullPath;
        response.config = config;
        try {
          // 对可能字符串不是json 的情况容错
          if (typeof response.data === "string") {
            response.data = JSON.parse(response.data);
          }
          // eslint-disable-next-line no-empty
        } catch (e) {}
        settle(resolve, reject, response);
      },
    };
    let requestTask;
    if (config.method === "UPLOAD") {
      delete _config.header["content-type"];
      delete _config.header["Content-Type"];
      let otherConfig = {
        // #ifdef MP-ALIPAY
        fileType: config.fileType,
        // #endif
        filePath: config.filePath,
        name: config.name,
      };
      const optionalKeys = [
        // #ifdef APP-PLUS || H5
        "files",
        // #endif
        // #ifdef H5
        "file",
        // #endif
        // #ifdef H5 || APP-PLUS
        "timeout",
        // #endif
        "formData",
      ];
      requestTask = uni.uploadFile({
        ..._config,
        ...otherConfig,
        ...mergeKeys(optionalKeys, config),
      });
    } else if (config.method === "DOWNLOAD") {
      // #ifdef H5 || APP-PLUS
      if (!isUndefined(config["timeout"])) {
        _config["timeout"] = config["timeout"];
      }
      // #endif
      requestTask = uni.downloadFile(_config);
    } else {
      const optionalKeys = [
        "data",
        "method",
        // #ifdef H5 || APP-PLUS || MP-ALIPAY || MP-WEIXIN
        "timeout",
        // #endif
        "dataType",
        // #ifndef MP-ALIPAY || APP-PLUS
        "responseType",
        // #endif
        // #ifdef APP-PLUS
        "sslVerify",
        // #endif
        // #ifdef H5
        "withCredentials",
        // #endif
        // #ifdef APP-PLUS
        "firstIpv4",
        // #endif
      ];
      requestTask = uni.request({
        ..._config,
        ...mergeKeys(optionalKeys, config),
      });
    }
    if (config.getTask) {
      config.getTask(requestTask, config);
    }
  });
};
